<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <title>圆的面积和周长计算</title>
</head>
<body bgcolor="lightblue">
<h2>圆的面积和周长计算</h2>
<form action="CircleAreaServlet" method="get">
  <table>
    <tr>
      <td>请输入圆的半径：</td>
      <td><input type="text" name="radius" required /></td>
    </tr>
    <tr>
      <td colspan="2" align="center">
        <input type="submit" value="计算" />
        <input type="reset" value="重置" />
      </td>
    </tr>
  </table>
</form>
</body>
</html>